Fuel-oil control apparatus



May 22, 11923. v 1,456,197

' H. A. TEDMAN FUEL OIL CONTROL APPARATUS Original Filed Feb. 11, 1921 62! v I Mu; a? 24 "I 24 LY 'mm 2e Il i 89 an 26" \Z/ 95 19 16 31 1;?

20 W w. W arr 5/6 I l I 1711112 11 38 I m Patented May 22, 1923.

UNITED HUDSON A. TEDKAN, OF GALESBUBG, ILLINOIS, ASSIGNOR TO WINSLOW BOILER: & ENGINEERING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

I FUEL-OIL CONTROL APPARATUS.

Application filed February 11, 1921, Serial No. 444,188. Renewed March 15, 1928.

To all whom it mry concern:

Be it known that I, HUDSON A. TEDMAN, a citizen of the United States, residing at Galesburg, in the county of Knox and State of Illinois, have invented certain new and useful Improvements in Fuel-Oil Control Apparatus, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to an apparatus for controlling the supply of fuel-oil to burners for boilers and furnaces of heating plants or systems, and consists in the matters hereinafter described and then pointed out in the appended claims.

In the drawings, Fig. 1 is a plan view of a portion of'a heating plant comprising the present invention, and

Fig. 2 is a sectional view on the line 2-2 of Fig. 1 showing the. valve-case and valve mechanism.

In the drawings the reference numeral 10 indicates an air-duct connected at its intake end to an air blower 11, and at its outlet end to a fire pot or barrier 12 to which fuel-oil is supplied by a fuel-plpe .13. The

blower is driven by-a motor 14, which is connected in a circuit from any suitable source of. current, it being understood that this circuit may be controlled by a handswitch or any means responsive to changes or variations in temperature in the buildin in which the plant is located.

in electrically operated valve is located in the oil-su ply pi e-line and is operated simultaneous y by t e electric current that operates the motor, the parts being arranged so that the'valve is held open to permit the flow of oil to the burner as long as the current passes to the motor and is closed to shut ofi the supply of oil when the motor sto s.

The va ve case 15 is supported conveniently near the air duct, being of any suitable size and cross section and preferably having an air port 16 to furnish air to the provide ventilation. The valve body is formed by a cup-shaped block 18 located in one end of the case and screw threaded,

on opposite sides for the connection of the 1 oil inlet pipe 19 and the outlet pipe 13 which pass through opposite sides of the case and respectively communicate with the inlet port 20 and the outlet port 21 formed m the lower portion of the block. The block is provided in its upper portion with a valve chamber 22 which is closed by a brass cover plate 23 attached at its periphery to the inner end of the block by screws 24 as shown. The inlet port 20 opens into the chamber, and the central portion of the block projects into the chamber ashort distance to form an upward extension which is shouldered to receive a screen 25 which is held in place b a ring 26. The central extension of the lock is provided with a passage 27 leading from the portion of the cha m er above the screen into the outlet port 21, and the upper end of this passage is formed as a seat for the valve face 28 which is mounted on the stem 29. cover 23 is provided with a guideway for the upper end of the valve stem, and a steel disk 30 is carried by the stem, being located a suitable distance below the cover so that the disk and valve may move up to open the oil passage. The upper end of the case forms a magnet chamber and is provided with a cross-bar 31 which carries a screw 32 by which a suitable laminated core '33 of an electromagnet is supported in place adjacent the cover 23. The core is "energized by the coils 34 which are connected by the wires 35 to the motor 14. When the motor is operated the magnet is ener- The gized and the disk 30 is drawn up toward thecover to raise the valve face from its seat so that the oil will flow from the chamber '22 through the passage 27 to the outlet port. When the motor stops the magnet is deenergized and the disk and valve fall so that the latter closesthe passage to the iiously driving the motor and energizing the interior and a perforated cover plate 17 tomagnet to open the valve may varied, an for simplicity of organization I prefer to connect the magnet coils and the motor to the source of current through the switch S.

The passage 27 is provided with an adjustable needle valve 36 to regulate its area and the amount of oil passing through, this valve being carried inthreaded engagement with a screw-bushing 37 entering a suitably threaded opening in the block. The valve.

36 is-held in position by a locknut 38, and its outer end is in a cup 39 that is closed by a plug 40 to prevent access to and tampering with the needle valve.

The valve face 28, its stem 29 and disk 30 are the only moving parts in the normal operation of the valve-mechanism, and all of these moving parts are in integral formation. The valve is opened simultaneously with the operation of the motor and remains open to allow oil to flow to the burner as long as the motor operates to supply the air necessary to form a combustible mixture, and when the motor stops the valve furnishes a positive cut-01f for the oil. The supplies of oil and air necessary to produce a combustible mixture for fuel in the burner are synchronized. The parts of the valve are permanently enclosed in the case and are so set and adjusted that the operation is automatic, and they cannot be manipulated by the user and will not become inoperative or fail to deliver the proper amount of oil when the motor runs unless the user deliberately opens the case and interferes with the adjustment.

The ventilating port 16 and the perforated cover 17 allow circulation of outside air through the magnet chamber to keep the magnet cool, and the port is preferably connected to the air duct 10, as by means of a pipe 41, so that circulation of air to cool the magnet is assured by the draft through the duct'which sucks outside air through the magnet chamber.

- I claim: g

- 1. In a device of the class described, a fuel-oil burner, a fuel-oil pipe line, an airblower to deliver air to the burner, an electric motor for the air-blower, and an electrically operated valve normally closing the pipe line and in circuit with the motor While the motor is operating, whereby the supplies of air and oil to the burner are synchronously controlled.

2. In a device of the class described, a

fuel-oil burner, a fuel-oil pipe line, an airblower to deliver air to the burner, an electric motor for the air-blower, a valve normally closing the pipe line, a magnet to open the valve, and means for synchronously energizing and deenergizing the magnet and motor.

3. In a device of the class described, a fuel-oil burner, a fuel-oil pipe line, an airblower to deliver air to the burner, an elecand a valve face normally closing said passage and having a metallic disk, an electromagnet adapted when energized to move the disk to open the passage, and means for synchronously energizing and deenergizing the magnet and motor while the motor is operating.

4. In a device of the class described, a fuel-oil burner, a fuel-oil pipe line, an airblower having a duct to deliver air to the burner, an electric motor for the air-blower, a casing having an air-port communicating with the air-duct and a perforated cover, a valve in the casing normally closing the pipe line, and a magnet in the casing adjacent the air-port and in circuit with the motor to open the valve.

5. In a device of the class described, a fuel-oil burner, a fuel-oilpipe line, an airblower to deliver air to the burner, an electric motor for the air-blower, an oil valve in the pipe line comprising a case, a metal late dividing the case mto upper and lower 0 ambers, the latter chamber having inlet and outlet ports communicating with said pipe line and connected by an oil-passage, and a valve face normally closing said passage and having a metallic disk, an electro-magnet in the upper chamber adapted when energized to move the disk to open the passage, and means for synchronously energizing and deenergizing the magnet and motor.

6. In a device of the class described, a fuel-oil burner, a fuel-oil pipe line, an airblower to deliver air to the burner, an electric motor for the air-blower, an oil valve in the pipe line comprising a case, a metal plate dividing the case into upper and lower chambers, the latter chamber having inlet and outlet ports communicating with said pipe line and connected by an oil passage,

an adjustable valve to regulate the area of saidpassage, a valve face normally closing said passage and having a metallic disk, a cross bar in the upper chamber, a screw in the bar, an electro-magnet carried by the screw adjacent the dividing plate and adapted when energized to move the disk to open the passage, and means for synchronously energizing and deenergizing the magnet and motor.

HUDSON A. TEDMAN. 

